<div id="tw-comment"></div>
<script>
    // 默认是暗色，根目录下的配置中的主题默认也是暗色
    const getStoredTheme = () => localStorage.getItem("pref-theme") === "light" ? "{{ .Site.Params.giscus.lightTheme }}" : "{{ .Site.Params.giscus.darkTheme }}";
    const setGiscusTheme = () => {
        const sendMessage = (message) => {
            const iframe = document.querySelector('iframe.giscus-frame');
            if (iframe) {
                iframe.contentWindow.postMessage({ giscus: message }, 'https://giscus.app');
            }
        }
        sendMessage({ setConfig: { theme: getStoredTheme() } })
    }

    document.addEventListener("DOMContentLoaded", () => {
        const giscusAttributes = {
            "src": "https://giscus.app/client.js",
            "data-repo": "{{ .Site.Params.giscus.repo }}",
            "data-repo-id": "{{ .Site.Params.giscus.repoId }}",
            "data-category": "{{ .Site.Params.giscus.category }}",
            "data-category-id": "{{ .Site.Params.giscus.categoryId }}",
            "data-mapping": "{{ .Site.Params.giscus.mapping }}",
            "data-strict": "{{ .Site.Params.giscus.strict }}",
            "data-reactions-enabled": "{{ .Site.Params.giscus.reactionsEnabled }}",
            "data-emit-metadata": "{{ .Site.Params.giscus.emitMetadata }}",
            "data-input-position": "{{ .Site.Params.giscus.inputPosition }}",
            "data-theme": getStoredTheme(),
            "data-lang": "{{ .Site.Params.giscus.lang }}",
            "data-loading": "lazy",
            "crossorigin": "anonymous",
        };

        // 动态创建 giscus script
        const giscusScript = document.createElement("script");
        Object.entries(giscusAttributes).forEach(
            ([key, value]) => giscusScript.setAttribute(key, value));
        document.querySelector("#tw-comment").appendChild(giscusScript);

        // 页面主题变更后，变更 giscus 主题
        const themeSwitcher = document.querySelector("#theme-toggle");
        if (themeSwitcher) {
            themeSwitcher.addEventListener("click", setGiscusTheme);
        }
        const themeFloatSwitcher = document.querySelector("#theme-toggle-float");
        if (themeFloatSwitcher) {
            themeFloatSwitcher.addEventListener("click", setGiscusTheme);
        }
    });
</script>